Method for asynchronous impulse response measurement between separately clocked systems

A method for avoiding cancelling in asynchronous impulse response measurement integration, the method comprising:

• generating an interrogation signal with two events spaced an original number of samples apart corresponding to at least twice a total length of a frequency response measurement data signal;
• playing the interrogation signal on a Device Under Test (DUT) and recording the interrogation signal with a measurement system;
• measuring the number of samples between the two events in the recorded interrogation signal;
• determining a clock rate difference between the DUT and the measurement system by comparing the measured number of samples to the original number of samples;
• generating a modified discrete time digital frequency response measurement data signal, including repetitions of a stimulus wave form, based on a sample rate adjusted by the clock rate difference;
• playing the modified discrete time digital frequency response measurement data signal through the DUT;
• recording the DUT output in the measurement system;
• and
• integrating the recorded signal with the repetitions of the stimulus wave form overlapped to reduce noise.

A method for avoiding cancelling in asynchronous impulse response measurement integration, the method comprising:

• generating an interrogation signal with two events spaced an original number of samples apart;
• playing the interrogation signal on a Device Under Test (DUT) and recording the interrogation signal with a measurement system;
• measuring the number of samples between the two events in the recorded interrogation signal;
• determining a clock rate difference between the DUT clock rate and the measurement system clock rate by comparing the measured number of samples to the original number of samples;
• generating a discrete time digital frequency response measurement data signal, including repetitions of a stimulus wave form, based on the DUT clock rate;
• adjusting the measurement system clock rate based on the measured clock rate difference;
• playing the discrete time digital frequency response measurement data signal through the DUT;
• recording the DUT output in the measurement system;
• and
• integrating the recorded signal with the repetitions of the stimulus wave form overlapped to reduce noise.